Lifting-jack.



' J. A. PHILLIPS.

LHTING JACK. APPLICATION FILED HAY 21, 1908.

Patented Oct. 6, 1908.

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damp/265406 jack of this character which may be chea Jornv A. PHILLIPS,0F BLOOMFIEVLI), INDIANA.

unwind-JAC Specification of Letters Patent.

Patented Oct. 6, 1908.

Application filed May 21, 1908. Serial No. 434,124.

.To all whom it may concern." 1

Be it known that 1,.JOHN A. PHILLIPS, citi zen of the United States,residing at Bloomfield, in the county of Greene and Stateof Indiana,have invented certain new and use ful 1m rovements in Lifting-Jacks, ofwhich the to owing is a specification.

This invention comprehends certain new and useful improvements liftinjacks, of the class known as lever bar, and c utch loop that embody abar or standard anda pair of runners one of which is. arranged to clutchthe standard .while the other is being raised, so as to effect .anintermittent climbing movement upon the standard, and thepresentinvention has for its primary object, a simple, durable andefficient construction of lifting 1y manufactured and easily assembledand disassembled, those parts of the jack upon which the strain or wearis not mainly 1mposed, being formedpreferably of .cast iron or the like,while those parts upon which the strain vcomes are composed of steel,thereby.

enabling axs-trong structure to be produced at a relatively low cost;and another object of this invention is an improved construction ofdeviceof thischaracter which will be 0si-' tive and sure in its actionand not ,liab e in any degree to accidentally lower the load that isbeing raised.

With these and other objects in view, as will more fully appear as thedescription proceeds, the inventionlconsists in certain constructions,arran ements and combinations of .the parts that shall hereinafterfullydescribe and claim.

For :a full understanding of the invention, referenceis tobe had to thefollowing description and accompanying drawings :in which:

; Figure 1 isa side elevation of a liftingjack embodying theimprovementsrof my invention; the lowerrunner being shown in section.Fig. 2 is an enlarged sectional view of a ortion of the jack, the.section being ta on through the ,upper runner; Fig. 3 is ,.-.ahorizontalsection on the line 33 of Fig-.2. Fig. 4 is a detail sectionalview through the [lower runner, on :anzenlargedl-scale; Fig. 5 is adetail-perspective view of the locking dog of the upper runner and-Fig.6 is a detail sectional view onthe linenoot 1. v .1

Corresponding and like parts are r fe r to he following description:andindieated 8 designates the lower runner.

in all the views of the drawings by the same reference characters.

Referring to the drawings, the numeral 1 designates the standard of myimproved lifting jack which is referably constructed of stee channeledon both sides and which may be secured at its lower end to the foot orbase 2 .of any desired construction. Preferably the standard 1 issecured at its upper end to a lifting handle 3 by which the device maybe carried from place to place, said handle embodying a wire clam 4 andbeing formed with a vise jaw 5, sai vise jaw being designed to coactwith a corresponding vise jaw 6, on the upv er runner 7 of the jack, andthe wire clampl4 eing designed to coact with a wire clam 4 on the said uper runner. By means 0" these accessories, t e jack may be used as awire stretcher or as a vise in addition to its primary function as alifting or hoisting apparatus.

The said lower runner 8 is mounted to move longitudinally on thestandard 1 and is formed in its rear side with a recess 9in which atoothed block 10 is rigidly connected, as by a rivet or the like, saidtoothed block being preferably formed of tool steel in.contradistlnction to the cast material of which the runner itself isformed and the teeth of the block being designed to engage thejteeth 1 1formed in the rear edge of the standard 1, as clearly illustrated in thedrawings.

The lower runner. 8 is hollow in its front I side and is formed with adepending nip le 12 designed to hold in place the up or end? of a coilexpansion spring 13. The ower end of thespring 13 fits around acorresponding nipple 14 formed on the lower extremity or arm 15 of anLshaped pitman fuloru-med at its elbow in the forward hollow portion ofthe lower runner8 as indicated at 17. v The; itman 13-6 projectsupwardly into the hol ow front portion of the upper runner 7 and isconnected to a wrist in 18 formed on .the operating lever 19, sa d leverbeing angular as shown and being fulcrumed at one end ,on the upperrunner 7 as indicatedat 20.

2 1 designates the preferably Wooden handle portion of the operatinglever.

22 designates the bearing surface of the upper runner upon which theload is placed, the rear side ofsaid bearing surfacepreferably-terminating in an upwardly rojecting spur 23;;which may bebent slight y inward whenever necessary to take up any wear so as toproperly bear against the front edge of the standard and which alsoserves as a rear abutment for the vehicle axle or other load imposedupon the bearing surface 22, to prevent the same from engagement withthe standard.

The upper runner 7 is formed in its rear side with a cavity 24 in whichthe referably steel block 25 is received, said b ock being secured inplace by transverse rivets or similar fastening means. The block 25 isformed with a chamber 26 which faces forwardly as shown and which isdesigned to accommodate the locking dog 27 of the upper runner said dogbeing formed with a toothed upper end 28 designed to engage the teeth 11of the standard. The dog 27 is supported at its lower end in a socketformed for it by the upwardl projecting lower extremity 29 of the bloc25. A preferably steel spring 30 which is of \I-shape, in the presentinstance, with its two leaves or members integrally connected together,is received in the chamber 26 back of the dog 27 and exerts a tension topress the dog forwardly into engagement with the teeth of the standard1.

In'order to hold the dog 27 retracted in the chamber 26 out ofengagement with the teeth 11, the said dog is formed in its front facewith a recess 31. A cross bar 32 fits in said recess and extendsoutwardly through laterally elongated slots 33 formed in the said wallsof the runner. The bifurcated re leasing lever 34 has its two armsfulcrumed at their forward extremities on the ends of said cross-pin 32.The lever 34 is formed with an apertured finger piece 35 by which it maybe pressed downwardly so as to ride with a cam action on the outer rearinclined wall of the upper runner 7 dog 27 backwardl the said leverfinally finding lodgment in the groove 36 formed in the rear wall of therunner so as to lock the lever in its released position, with the dogfully retracted.

37 designates a steel piece which is riveted or otherwise fastened inthe runner 7 below the block 25 in engagement with the lower end of theblock, so as to assist in supporting the same.

In the practical operation of my improved lifting jack, it is evidentfrom the foregoing description in connection with the accompanyingdrawing that by imparting a vertically oscillating movement to theactuating lever 19, the runners will alternately grip the standard,first one and then the other being raised so as to impart an upwardmovement to the load. In order to slide the runners downwardly upon thestandard, it is only necessary to swing the releasing lever 34downwardly so as to retract the dog in the chamber 26 and to then raisethe operating lever 19 so as to lower the upper runner until so as tospring the its lower end comes in contact with the lug 8 projectingupwardly from the rear side of the lower runner 8 whereupon the lowerrunner 8 will be caused to rock rearwardly so as to cause its toothedblock 10 to move out of engagement with the teeth 1.1 of the standardand both runners may then be slid freely down the standard.

As best seen in Fig. 6 the 0 )erating lever 19 is formed with a hollowcylindrical trunnion 19 which fits within a bearing opening in therunner as indicated at 20. A screw 20 works into the threaded bore 20 ofthe trunnion, a washer being interposed between the head of the screwand one side of the run ner, the purpose of said screw and washer beingto hold the operating lever securely in place, and to take up by itstension the wear.

Having thus described the invention, what is claimed as new is:

1. A lifting jack comprising a standard, upper and lower runnersmounted. to slide on said standard, an operating lever fulcrumed. on theupper runner and having a pitman connection with the lower runner, meanscarried by the lower runner for gripping the standard, the upper runnerbeing formed With a cavity, a block rigidly secured in said cavity, andformed with a chamber, and an outwardly spring pressed dog mounted insaid'chamber and arranged to engage the standard.

2. A lifting jack, comprising a standard, upper and lower runnersmounted to slide on said standard, the lower runner being arranged togrip the standard, an operating lever fulcrumed on the upper runner andhaving a pitman connection with the lower runner, the upper runner beingformed with a cavity, a block rigidly secured in said cavity and formedwith a forwardly facing chamber and an upwardly facing socket in thelower end of the chamber, andan outwardly spring pressed dog mounted insaid. chamber and supported with its lower end. in said socket andarranged for engagement with said runner.

3. A lifting jack, comprising a standard, upper and lower runnersmounted. to slide on said standard, the lower runner being ar ranged toclutch the standard, an operating lever fulcrumed on the upper runnerand having a pitman connection with the lower runner, a dog mounted inthe upper runner and spring pressed into engagement with the standard, across-pin interposed between a portion of the dog and the adjacent edgeof the standard, the upper runner being formed with laterally elongatedslots, accommodating the ends of said pin and the runner being furtherformed with an inclined outer wall, and a releasing lever forked toembrace the runner and pivotally connected. to the ends of said pin andarranged to ride upon the inclined wall of the runner whereby to drawthe dog backwardly against its spring tensioning means. i

4. A lifting jack, comprising a standard, upper and lower runnersmounted to slide on said standard, the lower runner being arranged toclutch the standard, an operating lever. fulcrumed on the upper runnerand having a pitman connection with the lower runner, a dog mounted inthe upper runner and spring pressed into engagement with the standard, across-pin interposed between a portion of the dog and the adjacent edgeof the standard, the upper runner being formed with laterally elongatedslots, accommodating the ends of said pin and the runner being furtherformed with an inclined outer wall, and a releasing lever forked toembrace the runner and pivotally connect the ends of said pin andarranged to rideupon the inclined wall of the runner whereby to draw thedog backwardly against its spring tensioning means, the runner beingformed with a groove designed for the reception of said releasing leverwhereby to hold the same in released position.

5. A lifting jack, comprising'a standard, upper and lower runnersmounted to slide in said standard, an actuating lever formed with atrunnion provided with a threaded bore, the upper runner being providedwith a bearing 0 ening receiving said trunnion, a screw wor 'ng in saidbore, and arranged to hold the trunnion in said opening, and anoperative connection between sald actuating lever and the lower runner.

6. A lifting jack, comprising a standard, upper and lower runnersmounted to slide on said standard, the lower runner being arranged togrip the standard, an operating lever fulcrumed on the upper runner andhaving a pitman connectionwith the lower run ner, the upper runner beingformed with a cavity, a block rigidly secured in said cavity and formedwith a forwardly facing chamber communicating with. the rear edge of thestandard, and with an upturned lower end producing a socket in the lowerend of the chamber, and an outwardly 'spring pressed dog mounted in saidchamber and supported with itslower end in. said socket and arranged forengagement with said runner. I

7. A lifting jack, comprising a standard, upper and lower runnersmounted to slide on said standard, the lower runner being ar-' ranged togrip the standard, an operating lever fulcrumed on the upper runner andhav ing a pitman connection with the lower runner, the upper runnerbeing formed with a cavity, a block rigidly secured in said cavity andformed with a forwardly facing chamber and an upwardly facing socket inthe lower end of the chamber, and an outwardly spring pressed dogmounted with its lower end in said socket and supported thereby in saidchamber, and means connected to the upper end of the dog for drawing itrearwardly as and for. the purpose set forth.

8. A lifting jack, comprising a standard, upper and lower runnersmounted to slide on said standard, the lower runner being arranged togrip the standard, an operating lever fulcrumed on the upper runner andhaving a pitman connection with the lower runner, the upper runner beingformed with a cavity, a block rigidly secured in said cavity and formedwith a forwardly facing chamber and an upwardly facing socket in thelower end of the chamber, a dog mounted in said chamber and supportedwith its lower end in said socket and arranged for engagement with saidrunner, and a leaf spring interposed between the rear side of the dogand the adjacent wall of the chamber and exerting a forward tension uponthe dog.

9. A lifting jack, comprising a standard, upper and lower runnersmounted to slide on said standard, the lower runner being arranged togrip the standard, an operating lever fulcrumed on the upper runner andhaving a pitman connection with the lower runner, a dog mounted in theupper runner and spring pressed into engagement with the standard, areleasing lever pivotally connected to the dog, the runner being furtherformed with an inclined outer rear wall and a groovetherein, and thereleasing lever bein arran ed to ride upon said inclined wal whereby todraw the dog backwardly a ainst its spring. tensioning means, the levereing further arran ed to engage in said roove whereby the ever may beheld in re leased position.

In testimony whereof. I aflix my signature in presence of two witnesses.

- JOHN A. PHILLIPS.

Witnesses:

ELMER ONEALL, CHAs. PAGE.

